Lock device



v July 3, 1945; E. NQJAcoBl 4 LOCK DEVICE 'original Filed April s, 1942.Edwaramaabz Vltionlisa division.

Edna-@N T- fsinvention: relates -the` locksl .and refers particularly tothe cylinder -andtumblerswo'f 4the 'doorrlatch locki'shown in PatentNo.:112',318,490,

issued to -Jacobiy Mayy 4', -l"$)4.%,.fand1v its di'-4visio'nal'copending application,v SerialNo. 437,547,

filed.: April Y3, '1942, .-and issued August. 29,119,411, asPatent-:No.12,357,004, of i which l.thisv applica .t In`lock devices ofthe-.type hereA under. consideration, as ,Well as in other tumblerlocks, it

is desirable thatf `the -1 cylinder: be removable. Various devices ihavebeen employed invl the past .fortremovably' securing the .cylinderinvits.` casing, .butgin ,general l.they all4 embody a ,spring pressed fdetenty carried Yeitherl -by the cylinder. or sthe casingy andyextending Vacross ithe. `,juncture therebetween;...to engage4 with anabutment or -shoulder from which the detent must be `freed to permitwithdrawal ofthe cylinder. A,- v yIt isalso: the Ipractice .zin tumblerflocks of th character,` described to'retain the individualptum-.blervsprings either by.. individual retainers; or

more ,suitably bymeans of a single retainer fixed j to,v the-cylinderwith portions. thereof .disposed over.the'tumblersprings. s e.

.- .4 ',Withaf-:vievv toward minimizing; the number off partsg. the 1present. invention combines thev functions of retaining the tumblersprings andrerriovablyl holdingl the -cylinder in its casing, thisfeature being claimed in the aforesaid copending application, Serial No.437,547.

The specific object of the invention here prebe made as come within thescope of the claims.

The accompanying drawing illustrates one com.. plete example of thephysical embodiment of the invention constructed according to the bestmode so far devised for the practical application of the principlesthereof, and in which:

Figure 1 is a side View of a lock cylinder equipped with tumblersconstructed in accordance with this invention;

:Figure 2 is a cross sectional view takenthrough Figurelontheplane-ofttheyzlineJfZa Figure 3- is-'afperspective viewer-the. clinder per se; I;l z 1; f Figurev 4L isa" *perspectiver 'view of f the4,combined tumbler spring and cylinder retainer; and:v u.

1 Refer-ring-l nowlparticularly .tozthe accompanying'k drawing, in"which-like numerals indicatelike parts, the numeral 5 designates acylinder'wvhich is. lpreferablyw-die c'ast and'has 'anwopenstrans-,verse :tumbler-cavity 6 z communicating. with a 'longitudinal keyway1.: The side .wallsfof .the cavity have opposite groovesextendingiacross'ltheir vfullfwidthI-to provide tumbler guideways in;which the4 side edges'ofgthe tumblers.9 areslidably re- CeVBds* if" '.Hnl: At one edge of the cavity the cylinder is'formed `1with1 bridges f-IU whichl extend :across .the cavity between the'- tumbler? guiding.groovesB.' These bridges; `togetlfier vwith ia`- similarly located ledge(not shown) on the inner.l orrearlendof :thecavity' provide landsinposition to collide .with t spring rstsl Il 4I on 'the i tumblers to'limit the? stroke-fof 1 the tumblers Iunder i ac-tion:l of"` theirspringg l2;

- Ther individual tun'iblers,E as best .shown' in Fig- `rure 15,ar`estampedffromat band vstock and vhave their medialportionsrecessed or cutout at" one edge to provide a key opening I3. The spring rests I I areprojections on'the inner edges of the intermediate tumbler portions,These projections are bent back to overlie the intermediate portions sothat the springs engaging the same are adjacent to the` intermediateportions of the tumblers to be guided thereby. Displacement of thesprings from the rests Il is prevented by having points on the restsproject into the ends of the springs.

Heretoforathe tumbler springs were held in place either by individualretainers or a common 'retainer secured in the cylinder, but in allinstances in the past, the tumbler spring retainers were fixedand'generally were staked into the cylinder. t

With the present invention, an entirely new form 0f tumbler springretainer is employed, and as a result the functions of retaining-theindividual tumbler springs andalso removably securing the cylinder inthe casing bore are performed by one unit. For this purpose, a novelcombination tumbler spring andcylinder retainer indicated generally bythe numeral I4 is provided.

As best shown in Figure 4, this retainer I4 consists of a sheet metalstamping having an elonyv k-

